public class Coin
{
   private final int HEADS = 0;
  
   private int face;
   public Coin()
   {
      flip();
   }
   public void flip ()
   {
      face = (int)(Math.random()*2);
    }
   public boolean isHeads()
   {
      return(face == HEADS);
   }
   public String toString ()
   {
       return ( face == HEADS)?"Heads":"Tails";
   }

}
